Rotary cutting, mixing and attrition mill



Aug. 23, 1932. R c, HOPKINS ROTARY CUTTING,

MIXING, AND ATTRITION MILL Filed Sept.. 2], 1929` Il-rI- O li ,P 1 in; T w n .w

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Patented Aug. 23, 1932 PATEN'n? OFFICE ROBERT C. HOPKINSl F ALLIANCE, OHIO ,ROTARY CUTTING, MIXING AND ATTBITION MILL Application led September 21, 1929. Serial No. 394,351.

The invention relates to mills for pulverizing, breaking up, mixing and screening the.

heavy particles of mineral, vegetable and animal matter in fluid or semi-fluid state and more particularly to a mill especially adapted to be placed in an oil line to an oil burner or the like for continuously grinding and feeding oil from a source of supply to the burner. f

The present improvement contemplates the upon the mill disclosed in my prior application, Serial No. 260,863, filed March 12, 1928, y now Patent No. 1,764,020'. In my former application the oil was admitted at right angles to a shaft carrying a gang of circular saws and was fed to the saws in somewhat the same manner as a board would be brought into contact with a saw for rippin The present improvement'contemp ates the' 3 admission of the oil at one side and one end of thel mill, the housing of which is divided into multiple chambers through which the oil is successively passed, a shaft extending longitudinally through the chambers, a series of radial spikes being provided 'upon the shaft in the initial chamber and circular saws being xed upon the shaft throughout the other chambers, the communicating ports between the chambers being alternatel located at diametrically opposite sides of t e shaft.

The object ofthe improvement is to provide an apparatus which will cut, grind, shred andmix the heavy particles of the oil to such an extent that it is thoroughly mixed of the same consistency and in condition to flow freely through the pipe lines, valves and other parts of the circulating system to an oil burner or the like. An embodiment of the invention is illustrated in the accompanying drawing in which Figure 1 is a longitudinal sectional view through the improved mill;

Fig. 2, a transverse section taken on the line 2-2, Fig. 1; and

Fig. 3, a similar section taken on the line 3,3, Fig. 1. l

Similar numerals refer to similar parts throughout the drawing.

The improved mill is provided with the housing, shown generally at 10, preferably located in horizontal position and of greater height than its width, as best shown in Figs. 2 and 3. Bearings 11, which may be provided with suitable lubricating glands are attached to opposite ends of the housing by screws or the like located through the flanges 12 of the bearings and into the end walls 13 of the housing.

The shaft 14 is located through the median line of the housing 'and journaled in the 60 bearings 11, one end thereof protruding through the corresponding bearing whereby any suitable driving means may be operatively connected thereto for rotating the shaft in the direction of the arrows shown in Figs. 05 2 and 3.

The interior of the housing-is divided into a plurality of chambers located in longitudin 'al succession throughout the length of the housing, as by the transverse partition walls 'l0 15 and 16 forming the initial chamber 17 and the secondary chambers 18 and 19.

The work of milling can be compounded, tripled, quadrupled or otherwise increased by the mere addition of secondary chambers, but for the purpose of illustration only two such chambers are shown. A hub 20 is fixed upon the shaft 14 within the initial chamber 17 and a plurality of radial spikes 21 are fixed in the peripheral portion of the hub. A plurality B0 of disk saws 22 are fixed upon the shaft extending through the chambers 18 land 19, these saws being preferably spaced as by the disks 23. The revolving cutter thus provided is axially disposed through all of the chambers.

A collar 24 is fixed upon the shaft adjacent to one end of the housing and a similar collar 25 is fixed thereon separating the disk saws from the spiked hub 20, a clamping nut or the like 26 being located upon the shaft near the oth'ljer end portion of the housing for clamping the hub and disks thereon.

The initial chamber 17 is provided with the inlet opening 27 which may be in the form 9 of a threaded boss as shown in Fig. 8 for the connection of a pipe leading from a pump or other source of oil under pressure.V A port 28 preferably located in the upper portion of the partition wall 15, forms a communication through all of the chambers, the revolving cutting member being provided with spikes .Within the first chamber and with saw disks within another chamber.

i v.6'V 8. A rotar)7 mill including a housing di' vided transversely into a plurality. of chambers, an oil inlet at one end ,portion of the housing into the first chamber, an oil outlet at the other end of the housing from the last w chamber, a communicatinfr port from each chamber to the next cham er and revolving cu ting means located through all of the chambers whereby the oil is successively ground and mixed in each of the several l chambers, said Eorts being alternately located above' and elow the revolving cutting means. l

9. A rotary mill including an elongated, substantially horizontal housing divided by transverse partitions into a plurality of chambers located in longitudinal succession throughout the length o the housing an oil inlet at one end of the housing into the first chamber, an oil outlet at the other end of the housing from-the last chamber, a communicating port fromeach chamber to the next chamber, and a revolving cutter member axially disposed through all of the chambers. In testimony that I claim the above, I

Y iO have hereunto subscribed my name.

ROBERT C. HOPKINS.f 

